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Usage: Overview

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
266,254 243,827 25% 41% 23% 11% 31,775 94% 3% 2% 1%
- Simulation Users 5
10,333 4,080 47% 27% 16% 10% 4,280 92% 4% 1% 3%
- Interactive Users 6
57,344 52,485 30% 41% 19% 10% 8,974 96% 2% 1% 0%
- Download Users 7
229,507 225,137 26% 40% 23% 11% 25,643 95% 3% 2% 0%
Total Users (old defn) 8
67,720 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 10,333 users
Simulation Runs 449,206 jobs
Total CPU Time 14,621 days  
Total Wall Time 39,800 days  
Total Interaction Time 7,363 days  
Users with > 10 mins of CPU Time 3,839 users  
Avg. Number of Simulation Runs/User 43 jobs  
Avg. Time between First and Last Simulation 406 days  
Repeat Users with > 10 Simulation Jobs 4,987 users  
Repeat Users with > 3 Months 9 2,783 users  
Table 3: Miscellaneous Statistics
Domains Served 17,633
Cummulative Interactive User Sessions 10 161,101
Cummulative Session Time 7,021 days
Visitors 11 567,285
Visits 12 1,774,313
New Accounts 10,756
Max User Logins 1000 users on 2014-02-19
Web Server Hits 74,678,538
Table 4: Collaboration Usage
Shared Tool Sessions 13 93
New tools under development 41
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
266,254 243,827 25% 41% 23% 11% 31,775 94% 3% 2% 1%
- Registered Users 2
23,332 6,084 47% 28% 16% 9% 6,368 89% 6% 1% 4%
- Unregistered Interactive Users 3
34,723 32,702 24% 46% 21% 9% 3,677 95% 3% 2% 0%
- Unregistered Download Users 4
208,199 205,041 25% 41% 23% 11% 21,730 95% 3% 2% 0%

  1. Sum of Registered Users2, Unregistered Interactive Users3 and Unregistered Download Users4
  2. Number of Users that logged in. User registration assigns a unique login to each individual user.
  3. Number of Unregistered Users, identified by unique hosts/IPs, that had an active Session 10 without logging in. Does not include known web bots/crawlers.
  4. Number of Unregistered users, identified by unique hosts/IPs, that had an active session of less than 15 minutes without logging in and downloaded a non-interactive resource such as PDF or podcast. Does not include web bots/crawlers.
  5. Number of Registered Users2 that ran one or more simulation runs.
  6. All Unregistered Users, identified by unique hosts/IPs, that had an active Session 10. Does not include known web bots/crawlers.
  7. All Unregistered users, identified by unique hosts/IPs that downloaded a non-interactive resource such as PDF or podcast. Does not include known web bots/crawlers.
  8. Sum of Simulation Users 5 + Unregistered Interactive Users 3 including web bots/crawlers.
  9. Number of Simulation users that returned after a gap of 3 months.
  10. Begins when an IP is active on the site for at least 15 minutes. Ends when inactive for more than 30 minutes, including time spent viewing videos.
  11. Identified by a unique IP address / hostname.
  12. Based on MIT OCW metric of Visits: A visit is activity by a unique visitor delimitated by a 30 minute absence from the site on either side of the activity.
    These visits correspond to unique visitors 11. Does not include known web bots/crawlers
  13. Number of Simulation sessions that were shared between 2 or more users.

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